Fuse for projectiles



Nov, 17, 1925.

1,562,054 L. E. REMONDY FUSE FOR PROJECTILES Filed April 6. 1925 4 Sheets-Sheet 1 Nov. 17,1925. 1,562,054 V L. E. REMONDY FUSE'FOR PROJECTILES,

Filed April 6. 1925 4 Sheets-Sheet 2' Fig.3.

' C c :1 5 Z I E i 2' 5151" 9 D No'v. 17,1925.

L. E. REMO NDY FUSE FOR PROJECT-11:55

Filed April 6.. 1925- 1 4' Sheets-Sheet a I I 7 Y NOV. 11,1925. v 1,562,054

' L. E. REMONDY Y FUSE Fdn PROJECTILES" FilecLApril a. 1925] v 4ishei-snejetii i rccted to a fuse comprising a movable carr age, containing the tiring elements, which Liven of action. less sensitive detonators (percumion caps) or shorter and less pom ed str s may be employed. That 15 39 to say, by lightening the carriage, either the sensitiveness or the safety of the tfuse may be incre ed. always'ot course, without intro ncinp; additional heavy and cun'ibersome devices.

15 it will imme ately be seen that, followin this last ll e of reasoning, it is possible, with a less sensitive detonator or percussion cap a id at less pointed striker, to dispense. withthe separating member provided be ween these parts, since an untimely imnact between them could not cause the dc tor to be ignited, the kinetic ene' v of the latter being insuliicient, for low velocities of the projectile, to produce asutlicient forceof impact.

The invention will be readily understood by reference to the a rcoinpanying drawings wherein like reference characters refer to like parts throughout the several views, and wherein,

Fig. 1 is a side elevation partly in section, illustratingone embodiment of the present invention;

Fig.5. :3 is a sectional view illustrating one Form oi" the invention which includes a resilient member between the primary and striker:

Fig. 3-3

is a sectional view similar to 2 illustrating another embodiment of the present invention;

ua are e is a section on the line 1-, l of is a View similar to Fig. 3 illus- ..c position of the elements shmvn and at the moment of impact: ind 8 refer to another embodiresent invention; (3 being: A a view showing the positio 1e parts, Fig. 7 a section taken on the line 4 sectional view illustrating the relative position of the parts at the instant of impact;

Figs. 9 and 10 are sectional side elevations illustrating: two other embodments of the present invention; and

Figs. 11 and 12 are a sectional side elevation and a top plan view respectively of still another embodiment of the present in vention, Fig. 11 being taken on the line 11 ii oi Fig. 1 1 Referring to Figure 1, i is the fuse body The extra light carriage, which encloses the whole of the mechanism, consists of two stampinn's, B and C, one of which, C, may be slightly domed to form an llnplct cap.

A striker is forn'ied centrally of the stamp in;.;' C by forcing the metal of the latter inwardly. The other stamping B, in which the first part may be hooked or set, forms the body of the carriage and contains the loose back part of the tiring; mechanism, viz the detonator D. Any forward move- LGlit oi the arrangement l-3--C may be prerented by a setting formed by tin-hing down the edge a of the fuse body over the e'lges oi the stamping C. i

'The carriao e may be prevented from be ing driven into the fuse body by the provision ot a simple ring or washer E made of cor felt, orof any other suitable plastic or compressible material, fitting on a lodgnient provided for the purpose in the fuse holder, and held between the expanded head of the carriage and a shoulder a formed on the fuse body.

it a sufiiciently short and blunt striker, together with a detonator possessing a sutliciently small degree ot sensitiveness is used, it is possible, as shown in the figure, to dispe c with any flexible or plastic separating member between the striker c and the detonator D.

If a projectile fitted with the fuse of the resent invention be dropped from a small le at the moment it strikes the obstacle the ground, deckof a vessel, platform or ie like) will in fact compress the plastic naterial E and, consequently force the carriage l; C rearwardly in the duct A, thus causing an impact to take place between the detonator l) and the Striker 0, before the carriage has arrived at the end of its stroke: but the l-zinetic energy 1 file/1V of the detonator (which may act while the carriage moves towards the interior ot the fuse body) will then be too small, on account of the ver small values 0t m and V, for the impact between D and c to cause the detonator to be ignited.

The plastic mass E is on the other hand sufficient to prevent any recoil of the carriage in the fuse body, when the shot is fired, since the carriage C.BD is extraordinarily light, for its weight may be of the order of one or two decigrams (0.2 grams).

These two conditions which are necessary, and suflicient for the fuse to operate, that is to say for the plastic retaining material E to be compressed and for a suitably violent impact to take place between the striker and the detonator D, will be definitely fulfilled however small the resistance offered by the obstacle struck, provided that the velocity V of the projectile and of the. detonator when this obstacle is struck, has a suitable value. If the obstacle stops or even simply retards the very light carriage, without materially effecting the velocity V ot the projectile and of the detonator, the value run - I tees-n54 i the'value of1/2m(V'vo) will be sufliciently high: for the. impactbetween c and D to produce the ignition of the detonator.

7 Naturally,- a separating member such as a spring F, for example, as shown'in the n'iodificationqin Figure 2, may be disposed ing B 'inth'e jinterioruof the c'arriage'without ma- 1-() r 'j @111 this inodification,-the stamping-C, at 1."; thebase andthe centre o-fwhich is formed {the striker 0,v comprises a cylindrical part sleeved inthe stamping B The bottom ofv thedetonatbr D, lodged in the interior ofthe stamping C, abuts: against 1 the" bottom of'the stamping B, and is held awayfrom the point 'of the striker by a spring'F the tension of which is suchfflthaflit-cannot-be compressed, due to the effect" of the kinetic -energy of thedetonatory has a suitable val'u'ei Phe edge a of the-fuse body is turned downv over the edge terially increasing itsjweighn unlessthe quantity Of the front'enlarged part B of the stamptrated in Figs. 3- and 5, the 'stampings B and G are of similarshape to those shown in the exarnpleillustrated in F igure l.

Hereythe sta nping. B: is provided with apertures,b placed diametrically opposite each other; in I which engage the wings g 1 I .7 of a 'ringvof-Washer- G, the said wings being gripped-between theback' faGQi-Of; the plastic material E andI-the shoulder at onthfe fuse V enydueto' influence ofthe irnpac't l of theprojectile'with an obstacle, even one which; otters very littleqresistance, thecarriage 15"C isstopped or retarded, the plastic material 'E is compressed-,which enables the i said carriage, to' be driven into the fuse body, the-apertures Z) or the-stamping B being displaced over the wings g .of'zthe ring or washer Gr. j The 'detonator D ,fwhichu contimies to move forward with theve'locity V of: the projectile, meets the striker, -0 with a kinetic energy 1 where is the carriage B 'C. v V Figs. 6:=- to 8' inclusive, ithe i 't-henesidua'l- ,-velocity," approaching ero, of

? Reterring', to

I carriage containing the whole ofthe .mechanisrn-is constituted by a stampihgB3inside which is lodged the "detonatorfD,' and by a disc C: Thefcentralgpart of thi s dis'c the influence of an external pressure mayebe made to'projectgfroinwthe internal face of the' disc. The member which normally preota into the lodgment formed'in the fusebody, xinay; as in the preceding examples; consist .tsmall, sleeve 1E, made orcork or any. othersuitableimaterials rpm-ga n; made e embodiment of the invention illusQ be varied'as desired.

which is formed" by a external cover or, base o'ti the carriage;- i stead of being'l-form'ed inraedisoi'if formed on a base which otherstamping.'1 l .7 v

- It is to' be ,note'd'thatthenew-n eans coii I c I I sisting in the striker being formed when the fuse-enters into operatiomqnayalsti bef einp'loy'ed with a-fixed carriage; containing a movable detonator or a-ifixecbdietonator. f y In the'lattr case,ltliedeformationof the i of cork or any other, plastic inaterial nor-yj nially prevents the carriage from II10V1I1g 011b T i of the fuse body. When the plug.

one which offers very-little resistance; the, material ofwhich this plug is made is driven towards the lnterior. :At the same," time" as;

it compresses the sleeve-Efthrough the medium of the disc C, the "plug H- bends down the central partl'ofthe discy-sofas H- strikes an- -obstacle,"eveni j 1 projectile and thedetonatorD continueitheir torwar'd'inovefnentg which causes aniiinpact between the detonatorthe. striker to" takeplace, r v It-isTseenthat mans-men is unnec'essary to provide any; safety ,device :or' any separatindmemberbetween the detonator D and the disc 0 the strikerbeing only formed as the result of an'iinpact between theifcara j riage and the obstacle; or '1nore-e,xIactly; be-- tween the obstacle and'th'e plug, of plastic material which surniounts" the twinge; v The shape of the cutsaniade in thedi'scC;

the number of thesef'ciitsyand the nature of the plug of plastic material naturally It goes without sayil? that the striker,

eto-rinat'ion ot; the i ny, be I forms .a parttotiany T disc in which the striker CLIi'J WVOUld'fOI-f 1 lowthe formation of-the strikef aiid'wo ul'd' v Figurext) shows, "in" longitudinal sectional; v

eiiec't the ignition. Y

elevation, a form of;construction;inawhich the twostanipingsiB and Care co xnbined 1";

in one single oneil P In thiscase the we end of etlie istainpi f ing is-tormedby the edge-0t theicylin drical body which is turneddown internally" a of thefuse b'Ody-QThe 'stainpingfas in Thedetonatbr D preferably rests on a or Washer 03 made otplastic material} Referring to the v embodimenfl'ot i the f in;

sleeve E, -made of plastic--miaterial, 1s H "gripped betweeneithisend and thePshoUlder 5 :120 r the preceding ekamp'lepis preventeditrcn'n moving. forwardby'iiasetting otxthe, openi end a of the fuse body.

provided with wings, similar to the one shown in the form of construction illustrated in Figures 3 and 4.

The plastic material which forms the means for preventing any backward movement of the movable carriage BCD is constituted by a sleeve E, made of cork, felt or the like suitable material, lodged in the interior of the stamping B around the striker 0 and resting by means of its front face against the end C, while its back face presses against, the ring or washer G. The wings may be rendered stationary by means of a small cylindrical liner H, over the front face of which the front edge a of the fuse body is turned down. It will be seen in this case that the plastic material E, at the same time as it forms a means for retaining the carriage in its extreme forward position, forms a separating member preventing any untimely approach of the detonator and the striker towards each other until an obstacle is struck.

Referring to the embodiment of the invention illustrated in Figs. 11 and 12, the plastic material E which forms a means for retaining the carriage BC is replaced by flexible tongues C forming projections on the disc C and engaging in small mortices A formed in the front face of the fuse body. These tongues O are fixed in position by the lips 0, of the mortices being bent over, after the carriage has been placed in position in the said mortices.

When an obstacle is struck, the carriage 13-0 is driven into the duct A the tongues C giving way under the force of the impact. 7

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. A fuse for projectiles comprising a fuse body having a duct formed therein, a hollow carriage movably mounted within the said duct, a cover for said carriage, a striker integral with the said cover, and a detonator within the said carriage.

2. A fuse for projectiles comprising a body portion having a duct therein, a hol- .low carriage formed by stamping mounted in said duct adjacent one end thereof, a detonator mounted for movement in the rear end of the carriage, and a striker formed in the forward wall of the carriage and integral with said wall.

3. A fuse for projectiles comprising a fuse body, a hollow carriage movably mounted therein, a detonator within said carriage and a striker formed by one wall of the carriage.

4. A fuse for projectiles comprising a fuse body, a hollow carriage movably mounted therein, a cover for said carriage, a striker formed integrally with and centrally of said cover, and a detonator within said carriage.

5. A fuse for projectiles comprising a fuse body, a hollow carriage movably mounted therein, a cover for said carriage, a striker comprising a projection formed in the cover and a detonator within said carriage.

6. A fuse for projectiles, comprising a fuse body, a movable carriage mounted therein, a cover for said carriage, a striker formed in the cover comprising a portion displaced centrally thereof, and a detonator within said carriage.

7. A fuse for projectiles comprising a fuse body having a duct leading to the interior thereof, a carriage movably mounted in said duct, a striker projecting inwardly from one end of the said carriage, a detonator within the carriage, and means formed on the fuse body adjacent the mouth of the duct to prevent outward movement of the carriage.

8. A fuse for projectiles comprising a fuse body having a duct formed therein. a carriage mounted in the said duct, said carriage comprising a pair of stampings, one of which forms the base and the other of which forms the cover of the carriage, a striker projecting inwardly of the carriage from the cover, and a detonator within the base of the carriage.

9. A fuse for projectiles comprising a fuse body having a duct formed therein, a carriage mounted in the said duct, said carriage comprising a cylindrical base portion open at one end, a flange-formed on the base adjacent its open end, a cover for said base, a striker comprising a projection displaced centrally of the cover, and a detonator within the said base of the carriage.

10. A fuse for projectiles comprising a fuse body having a duct formed therein, a carriage having an enlarged head mounted in the said duct, a striker projecting inwardly of the carriage from the said head, and a detonator within the carriage in unrestricted communication with the striker.

llpA fuse for projectiles comprising a fuse body having a duct formed therein, a carriage mounted in the said duct, said carriage comprising a cylindrical body portion and an enlarged cover therefor, a striker formed centrally of and projecting inwardly from the said cover, and a detonator loose- -ly supported within the body portion of the sa1d carriage.

12. A fuse for projectiles comprising a fuse body having a duct leading to the interior thereof, an annular shoulder formed adjacent the outer end of said duct, a carriage movably mounted in the said duct, an enlarged head formed on the said carriage and adapted to project over said annular shoulder, a striker formed centrally of and projecting inwardly from the said enlarged head, resilient means interposed between saidenlarged head and said annular shoulder to resist inward movement of the said oarriag e, end a odetonzitor loosely supported Within said oarr'iag'e.

13. A fuse for pro ectilescomprisinga;

fuse body having a duct leading to the inte-' i i'ior thereof, an annular shoulder formedad- H .jacent the outer end of the said duct, a ca-rriage movably mounted in the duct, said can 1 riage Comprising a cylindrical body portion I and-an enlarged dome-shaped headynieans r I, interpose'clbetween' the said enlarged head 1 and the mnular siho'ulder to yieldingly resist inward movement of the carriagqan an-' nularflange formed adJaCent the mouth of] the duct to limit outwardmovement of the carriage, a striker formed centrally of and munication with the said 'st riken v In testimony whereof I have signed this (specification. I 7 I LEON EMILE'REMONDY. 

